WHAT ARE YOU LOOKING AT?

this morning, on the train, i was sitting, minding my own business, reading a book. (i forgot my headphones, so no ipod, always a sad day...) - anyway, we were at 14th street. and suddenly i heare "WHAT ARE YOU LOOKING AT!?!?!" coming from inside the train, i look over, and it is a middle aged man, dressed normally, with a coffee a newspaper and a bag - looking across at a couple who were sitting there, she with her headphones, he reading a newspaper, arms linked. then he stood up "WHY ARE YOU LOOKING AT ME!?" and of course, then EVERYONE was looking at him.. he left the train, but still stood there facing the train yelling "WHYRE YOU LOOKING AT ME. STOP IT." and i think he got back on the train because a few people got off (in fear, i think) i looked at the two business men sitting across from me and thought i would be safe in case the crazy man went on some sort of rampage. so i wonder - was he crazy? was he the husband of that crazy lady i saw months ago who looked completely normal but was yelling out loud? he looked like he was on his way to the office. does he yell in paranoia in the office? are his coworkers getting ready for an intervention? or does he just act like that in the confines of the subway where no one knows him and he feels unsafe? i dont know, but it certainly was an entertaining way to start the day...